#!/bin/bash
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#

#
# Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
#

. /lib/svc/share/smf_include.sh

PATH=/usr/bin

TEXINFO_DATA_DIR="/var/info"

function readlink() {
	while getopts f name; do
		case $name in
			f) follow=1 ;;
		esac
	done
	shift $((OPTIND - 1))

	if (( follow )); then
		python -ESc "import os; print os.path.realpath('$1')"
	else    
		python -ESc "import os; print os.readlink('$1')"
        fi
}

function populate_texinfo_directory() {
	directory=$(dirname $1)
	dir_file=$(readlink -f $1)

	[[ ${dir_file} -ot ${directory} ]] || return

	case "${dir_file}" in
	/var/info/*)	# Only process if the link resolves inside /var/info.
		echo "populating ${dir_file} from ${directory}"
		rm -f ${dir_file}.new
		for info_file in $(find ${directory} -type f | \
				   egrep -v -e '-[0-9]+$') ; do
			install-info --dir-file=${dir_file}.new \
				--info-file=${info_file}
		done
		owner_group='root:bin'	# default owner/group
		if [[ -f ${dir_file} ]] ; then
			# get owner/group from original file
			group_bin=$(ls -l ${dir_file} | \
				    awk '{print $3":"$4}')
		fi
		if [[ -f ${dir_file}.new ]] ; then
			# new dir file created, replace the original one
			mv -f ${dir_file}.new ${dir_file}
			chmod -f 0644 ${dir_file}
			chown -f ${owner_group} ${dir_file}
			ln -s ${1} ${dir_file}.backlink 2>/dev/null
		else
			# no dir file created (no input files installed)
			rm -f ${dir_file} ${dir_file}.backlink
		fi
		;;
	esac
}

### Begin Here ###

case "$1" in
'start'|'refresh')
	if [[ "$1" = 'start' ]]; then
		if [[ ! -f "/.SELF-ASSEMBLY-REQUIRED" ]]; then
			exit $SMF_EXIT_OK
		fi
	fi

	# refresh texinfo directories
	for dir_link in $(pkg search -H -l -o path ':link:path:*/info/dir' | \
			  sort -u) ; do
		# test the directory is writable
		if [[ ! -w /${dir_link} ]]; then 
			echo $SMF_EXIT_OK
		else
			populate_texinfo_directory /${dir_link}

		fi
	done
	# remove any unreferenced directories
	for link in $(find ${TEXINFO_DATA_DIR} -type l -name '*.backlink') ; do
		path=$(readlink ${link})
		if [[ ! -L ${path} ]] ; then
			file=${link%.backlink}
			echo -n "removing unreferenced texinfo directory: "
			echo "${file} ${link}"
			rm -f ${file} ${link}
		fi
	done
	;;
*)
	echo "Usage: $0 (start|refresh)"
	exit 1
	;;
esac
exit $SMF_EXIT_OK
